From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jianchao Wang , Sagi Grimberg , Max Gurtovoy , Christoph Hellwig , Sasha Levin Subject: [PATCH 4.17 115/336] nvme-rdma: stop admin queue before freeing it Date: Wed, 1 Aug 2018 18:47:30 +0200 Message-Id: <20180801165033.551254396@linuxfoundation.org> In-Reply-To: <20180801165028.930831994@linuxfoundation.org> References: <20180801165028.930831994@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jianchao Wang [ Upstream commit 2e050f00a0f0e07467050cb4afae0234941e5bf3 ] For any failure after nvme_rdma_start_queue in nvme_rdma_configure_admin_queue, the admin queue will be freed with the NVME_RDMA_Q_LIVE flag still set. Once nvme_rdma_stop_queue is invoked, that will cause a use-after-free. BUG: KASAN: use-after-free in rdma_disconnect+0x1f/0xe0 [rdma_cm] To fix it, call nvme_rdma_stop_queue for all the failed cases after nvme_rdma_start_queue. Signed-off-by: Jianchao Wang Suggested-by: Sagi Grimberg Reviewed-by: Max Gurtovoy Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/nvme/host/rdma.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -778,7 +778,7 @@ static int nvme_rdma_configure_admin_que if (error) { dev_err(ctrl->ctrl.device, "prop_get NVME_REG_CAP failed\n"); - goto out_cleanup_queue; + goto out_stop_queue; } ctrl->ctrl.sqsize = @@ -786,23 +786,25 @@ static int nvme_rdma_configure_admin_que error = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap); if (error) - goto out_cleanup_queue; + goto out_stop_queue; ctrl->ctrl.max_hw_sectors = (ctrl->max_fr_pages - 1) << (ilog2(SZ_4K) - 9); error = nvme_init_identify(&ctrl->ctrl); if (error) - goto out_cleanup_queue; + goto out_stop_queue; error = nvme_rdma_alloc_qe(ctrl->queues[0].device->dev, &ctrl->async_event_sqe, sizeof(struct nvme_command), DMA_TO_DEVICE); if (error) - goto out_cleanup_queue; + goto out_stop_queue; return 0; +out_stop_queue: + nvme_rdma_stop_queue(&ctrl->queues[0]); out_cleanup_queue: if (new) blk_cleanup_queue(ctrl->ctrl.admin_q);